Millennials get a bad rap. People say that we’re slacktivists. We will conveniently like a post on Facebook to support a friend’s kid’s cancer recovery or tweet about our disagreement of the Keystone Pipeline, but we wouldn’t donate money or get out to vote.

But this just isn’t true. Eighty-five percent of millennials gave to charity when compelled by a mission or cause in 2011, and 84 percent volunteered, according to the Millennial Impact Survey. We aren’t giving big bucks — in 2012, most millennials’ biggest gift was less than $150. However, we gave to an average of five nonprofits. Plus, 87 percent of us expected to give to at least as many nonprofits the following year.

Millennials are also more likely to give back in different ways than older generations. Internet activism is a big piece of it. Millennials primarily use social media when deciding which charity to donate to and how to do so. Pamela Owunta, a nonprofit consultant, adds that these donors also want to volunteer and be more involved with the organization than prior generations have been.

In comparison, Owunta points out, older generations respond to direct mail campaigns, phone calls, and in-person meetings in which they learn about the organization’s sustainability and client stories. Additionally, they love handwritten notes and birthday cards from development staff.

It’s clear that millennials have dramatically changed the way nonprofits fund-raise. How many times have you seen a GoFundMe link on your Facebook newsfeed? How many times did you click on it? GoFundMe is a website that allows for crowdfunding, whether you are an individual, group, or organization. When I was volunteering in Israel, we set up a page to gather funds for an event in our community. We reached our goal within days! Most recently, I saw a friend post a page to raise $50,000 for the cancer treatment of another friend’s father — treatment that has been denied by the insurance company. They have raised nearly 40 percent of their goal as I write this.

Online donations have increased in the last few years, and when a person posts about a social cause, friends take the time to learn more about it and ask their friend for more information. Campaigns like Giving Tuesday, which takes place every year on the Tuesday after Thanksgiving, have dramatically increased the amount that nonprofits can raise, and it’s completely virtual. As a result, online fund-raising has increased an estimated 470 percent since Giving Tuesday’s inception, and #GivingTuesday had almost 1.3 million social-media mentions in 2016.

Millennials are also more likely to give to a cause they believe in rather than to an official organization.

They want to see the stories of success in a new way. Natalie Ebel, the marketing director for Pencils of Promise, was quoted in the New York Times as saying, “We talk to people as if we are a brand not asking for money but building a community to change the world.”

Social entrepreneurship, a subject that yields over 5.3 million results on Google, is big today. Companies like TOMS shoes have tapped into this trend effectively. For each purchase of a pair of shoes, the company gives something to a person in need. This could be a pair of shoes, water, birth kits, or even health care. People have donated over 60 million shoes; 400,000 people had eyesight restored using glasses or surgery; 335,000 gallons of safe water have been given out; and 25,000 birth kits have been distributed. The sheer volumes of giving puts a stop to the criticism regarding the sustainability of these programs.

Despite student debt and stagnant wages, it’s obvious that millennials use their purchasing power wisely. I served in AmeriCorps and volunteered both locally and abroad, and I currently strive to donate as much as I can to causes that I support. I am just one among millions of millennials who are giving to charity and changing the face of philanthropy.

Bill Gates and Warren Buffett started the Giving Pledge in 2010, which was meant to inspire wealthy people to give a bulk of their net worth to philanthropy, either during their lifetimes or posthumously. It’s clear that they have both taken this to heart. For example, Gates recently gave 64 million Microsoft shares to the Bill & Melinda Gates Foundation, which was valued at about $4.6 billion.

Of course, we’ve all heard about the likes of Gates and Buffett. But there are some other impressive, yet unknown philanthropists out there.

We’ve told you about some notable female heroes of our age, but there are some men who don’t get the credit they deserve, either. Here’s our list of lesser-known male philanthropists:

1. Ray Dalio

Ray Dalio founded Bridgewater Associates, which became the largest hedge fund in the world in 2012. By 2014, its assets numbered $160 billion. Ray and his wife, Barbara, began the Dalio Foundation in 2003 as a way to give to causes that they support. It focuses on education, health, community development, and the environment, with a particular interest in nontraditional projects, such as supporting research and education around transcendental meditation. Starting with $3.8 million in grants in 2003, the foundation increased its giving to $119 million in 2014.

2. Azim Premji

Azim Premji, a native of India, is responsible for growing the IT firm Wipro to its current status as one of the global leaders in the software industry. He became the first Indian and third non-American to join the Giving Pledge, initiated by Bill Gates and Warren Buffet. Premji said that being rich “did not thrill” him, so he started his foundation in 2000 to facilitate the universalization of primary education. The foundation is not a grant-making organization. Instead, it works with state governments across India on curriculum reform, policy, and teacher education, even starting its own university.

3. Pierre Omidyar

Pierre Omidyar founded eBay in 1995. And along with his wife Pam, he also began a number of organizations that are now classified collectively under the Omidyar Group. These initiatives include the Democracy Fund, which aims to support the democratic process; and Humanity United, which brings new approaches to seemingly impossible-to-solve world problems. The Omidyar Network also funds organizations that work on education, emerging tech, financial inclusion, governance and citizen engagement, and property rights. Pierre recently gave nearly $500,000 to an experimental initiative in Kenya that’s testing the viability of a basic income in reducing poverty.

4. Hansjörg Wyss

Hansjörg Wyss is the founder of Synthes USA, a medical device manufacturer that makes internal screws and plates for broken bones. A native of Switzerland, he joined the Giving Pledge in 2013 and has donated nearly $2 billion. This includes giving millions to universities to encourage medical research. He also has a passion for protecting land in the American West, which he now calls home. In 2013, he donated $4.25 million to the Trust for Public Land to protect 58,000 acres of land in Wyoming’s Hoback Basin from development. Plus, he’s invested in reducing inequality by funding women’s initiatives and ensuring the humane treatment of refugees and immigrants.

5. James Simons

James Simons worked for the defense department cracking codes before teaching at MIT, Harvard, and Stony Brook University. After leaving academia in 1978, he started the Renaissance Technologies Corporation, which is one of the most successful hedge funds to use quantitative trading, a method that relies on mathematics to determine investment strategies.

He gives generously to his family’s organization, the Simons Foundation, as well as the Nick Simons Institute, the non-profit Math for America, and many other causes. The Simons Foundation focuses on education and research in math and science, and the Nick Simons Institute funds rural health-care initiatives in Nepal. Meanwhile, Math in America supports professional development for STEM teachers throughout the country.

6. Gordon Moore

Gordon Moore is the co-founder of Intel. He and his wife Betty started the Gordon and Betty Moore Foundation with $5 billion in 2000. The organization focuses on environmental conservation, scientific research, and patient care in the San Francisco Bay Area. Before funding a program, they verify that the foundation’s assistance can make a difference, if outcomes are measurable. They also assess what can be impacted positively in addition to the program in consideration.

A Final Thought

These philanthropists have a large amount of influence in their communities. But that doesn’t mean that people with less money can’t have an impact, as well. I donate hundreds of dollars each year to causes that I know are important. And even you can only afford to give $5, even that small amount can make a difference.

Women have been integral to donating money to organizations small and large through family foundations. We don’t often hear about who they are or how they make their decisions, but it’s clear that their passions dictate which causes receive funding.

Some of these women are influencing their communities and the world in significant ways.

Here are the stories of six top female philanthropists who are doing their part:

1. Roxanne Quimby

In 2016, Burt’s Bees co-founder Roxanne Quimby gave 87,654 acres of land in Maine to the federal government for use as a national park. This, however, upset many residents, possibly because she didn’t allow hunting, logging, or motorized vehicles on the land she owned.

Her history is fascinating: She used to live off-the-grid and helped to build the company she co-founded with Burt Shavitz in the 1980s. Quimby acquired Shavitz’s stake in the company in the 1990s and eventually sold the company to Clorox in 2007. She is now primarily involved in funding conservation work in Maine.

2. Sheryl Sandberg

Following the sudden death of her husband, Dave, she wrote a book that coincided with the development of Option B, an organization that supports resiliency programs.

Before that, Sandberg co-founded the Lean In Foundation, which supports women’s advancement in the workplace. A signer of Bill Gates’ Giving Pledge, Sandberg is planning to give away more than half of her wealth during her lifetime.

3. Suzanne Dworak-Peck

Suzanne Dworak-Peck is an accomplished social worker. She received her bachelor’s and master’s in social work from the University of Southern California. In 2016, she gave $60 million that she gained from real-estate investments and consultancy work in Hollywood to the university’s School of Social Work, which now carries her name in honor of her largesse. Dworak-Peck has served as president of the National Association of Social Workers (NASW). She also founded NASW Communications Network Inc., which aims to accurately portray social workers in movies and on television.

4. Elaine Wynn

Elaine Wynn co-founded hotel and casino companies like the Mirage and Wynn resorts with her former husband, Steve Wynn. Wynn is passionate about children’s education and serves on the National Board of Directors of Communities in Schools, a nonprofit that supports low-income students. As trustee of the Elaine P. Wynn & Family Foundation, she has also donated to many causes, including after-school programs, the arts, and hunger relief. She also supports many causes in the area of health, especially children’s health and Las Vegas-area hospices.

5. Marilyn Simons

Marilyn Simons heads up the Simons Foundation. She and her husband, James, started this organization with funds he earned through building the investment management company Renaissance Technologies. The foundation primarily supports scientific research, making grants to individual researchers through their sponsoring academic institutions. One of the newer programs it funds is Simons Collaborations. This project focuses on encouraging partnerships across the disciplines of mathematics, physics, and the life sciences. Simons also founded the Simons Foundation Autism Research Initiative to “improve the understanding, diagnosis, and treatment of autism spectrum disorders.”

6. Sara Blakely

While she may not be giving away as much as many of the other women discussed here, Sara Blakely is an inspiration to female entrepreneurs and philanthropists.

Blakely was selling fax machines door-to-door when she invested her life savings in the creation of Spanx, a pantyhose that didn’t have seamed toes. She invented the product herself and founded the company in 2000. At first, she operated the company out of her own apartment.

She later began the Sara Blakely Foundation in 2006 to focus on empowerment initiatives for women and girls worldwide. In 2013, Blakely became the first self-made female billionaire to sign the Giving Pledge. Some of the organizations she supports are local to Atlanta, where the company is based. Meanwhile, others are national and international. This includes the Malala Fund, Girls on the Run, Atlanta Girls School, and the Sirleaf Market Women’s Fund.